On Kippenhahn curves and higher-rank numerical ranges of some matrices

2021/04/16 by Bebiano, Natália, da Providéncia, Joáo, Spitkovsky, Ilya M. · 1 citation
#15A60 #FOS: Mathematics #Functional Analysis (math.FA)

paper · doi:10.48550/arxiv.2104.07893

Abstract

The higher rank numerical ranges of generic matrices are described in terms of the components of their Kippenhahn curves. Cases of tridiagonal (in particular, reciprocal) 2-periodic matrices are treated in more detail.

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